lib/python/Components/Converter/EventTime.py

   1 from Converter import Converter
   2 from Poll import Poll
   3 from time import time
   4
   5 class EventTime(Poll, Converter, object):
   6         STARTTIME = 0
   7         ENDTIME = 1
   8         REMAINING = 2
   9         PROGRESS = 3
  10         DURATION = 4
  11
  12         def __init__(self, type):
  13                 Converter.__init__(self, type)
  14                 Poll.__init__(self)
  15                 if type == "EndTime":
  16                         self.type = self.ENDTIME
  17                 elif type == "Remaining":
  18                         self.type = self.REMAINING
  19                         self.poll_interval = 60*1000
  20                         self.poll_enabled = True
  21                 elif type == "StartTime":
  22                         self.type = self.STARTTIME
  23                 elif type == "Duration":
  24                         self.type = self.DURATION
  25                 elif type == "Progress":
  26                         self.type = self.PROGRESS
  27                         self.poll_interval = 30*1000
  28                         self.poll_enabled = True
  29                 else:
  30                         raise str("'%s' is not <StartTime|EndTime|Remaining|Duration> for EventTime converter" % type)
  31
  32         def getTime(self):
  33                 if self.cache is None or self.cache[0] is None:
  34                         self.cache = (self.__getTime(), self.cache and self.cache[1])
  35                 return self.cache[0]
  36
  37         def __getTime(self):
  38                 assert self.type != self.PROGRESS
  39
  40                 event = self.source.event
  41                 if event is None:
  42                         return None
  43
  44                 if self.type == self.STARTTIME:
  45                         return event.getBeginTime()
  46                 elif self.type == self.ENDTIME:
  47                         return event.getBeginTime() + event.getDuration()
  48                 elif self.type == self.DURATION:
  49                         return event.getDuration()
  50                 elif self.type == self.REMAINING:
  51                         now = int(time())
  52                         start_time = event.getBeginTime()
  53                         duration = event.getDuration()
  54                         end_time = start_time + duration
  55                         if start_time <= now <= end_time:
  56                                 return (duration, end_time - now)
  57                         else:
  58                                 return (duration, None)
  59
  60         def getValue(self):
  61                 if self.cache is None or self.cache[1] is None:
  62                         self.cache = (self.cache and self.cache[0], self.__getValue())
  63                 return self.cache[1]
  64
  65         def __getValue(self):
  66                 assert self.type == self.PROGRESS
  67
  68                 event = self.source.event
  69                 if event is None:
  70                         return None
  71
  72                 now = int(time())
  73                 start_time = event.getBeginTime()
  74                 duration = event.getDuration()
  75                 if start_time <= now <= (start_time + duration) and duration > 0:
  76                         return (now - start_time) * 1000 / duration
  77                 else:
  78                         return None
  79
  80         time = property(getTime)
  81         value = property(getValue)
  82         range = 1000